As the title really, left scratching my head in how to track this down. It's had the elements disconnected and still trips so I presume this means the elements are fine?It tripped this morning then pulled one cappuccino before tripping again. So really was looking at some advice in how to track down the cause, whilst it's not had a proper refurbishment it's also never seen the work, or hard water that it can take. It's been fine and ran with no issues apart from some loose bits keeping the hot water tap solenoid from closing properly.

I do have the schematics but have some very rudimentary knowledge of a multimeter and don't even know where to start, my guess is we have short that is tripping the circuit breaker but how do I track it if it trips every time it's turned on?

It's been fine it's been in use twice daily for about a year. No extras on the circuit, worked fine yesterday. This sees the lightest use ever, now I've got it, but even in when it was commercial it's not done much more than cosmetic damage.

Edit..Sure I read something else..

Inside looks fine, still think I'll have a closer look, if it's not this. What would be next could solenoids do this etc..

Try it on another circuit. IT could be a bad GFCI or bad breaker. Be sure that it is GFCI protected wherever you test it. Rotary pump? Could it be a shorted start capacitor? Try disconnecting the pump leads.

still not clear as soon as you flip the main switch or as soon as you start a shot?option one will eliminate the above GOOD suggestion from Randyunless of course the autofill is kicking in, which as we know doesn't do that every-time,

basically where I'm trying to take you iseliminate components failure or look for electrical connection possibly getting wet

As I read the thread, I came to the same thought as Stefhano, If the pump is shorted out, the breaker will trip any time you try or the machine tries to use the pump, such as filling the boiler when starting or when you start to pull a shot. Timing is important.

In real life, my name isWayne P.Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

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